<!--
 * @Description: bs使用
 * @Author: charles
 * @Date: 2021-08-16 09:41:56
 * @LastEditors: charles
 * @LastEditTime: 2021-08-16 10:09:28
-->
<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.2/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-EVSTQN3/azprG1Anm3QDgpJLIm9Nao0Yz1ztcQTwFspd3yD65VohhpuuCOmLASjC" crossorigin="anonymous">
  <!-- <link href="https://cdn.bootcdn.net/ajax/libs/twitter-bootstrap/2.3.2/css/bootstrap.min.css" rel="stylesheet"> -->
  <title>bootstrap</title>

  <style>
    .menu {
      background-color: #f4f4f4;
      text-align: center;
      line-height: 3em;
    }
  </style>
</head>
<body>
  <div>hello world</div>
  <h1>一级标题</h1>
  <h2>二级标题</h2>
  <button class="btn btn-primary">查询</button>
  <button class="btn btn-danger">删除</button>

  
  <div class="menu row">
    <div class="col-sm-12 col-md-6 col-lg-3">微信</div>
    <div class="col-sm-12 col-md-6 col-lg-3">通讯录</div>
    <div class="col-sm-12 col-md-6 col-lg-3">发现</div>
    <div class="col-sm-12 col-md-6 col-lg-3">我</div>
  </div>


  <table class="table">
    <thead>
      <tr>
        <th>编号</th>
        <th>姓名</th>
        <th>性别</th>
        <th>手机号</th>
      </tr>
    </thead>
    <tbody>
      <tr>
        <td>1</td>
        <td>刘明</td>
        <td>男</td>
        <td>18812344321</td>
      </tr>
      <tr>
        <td>2</td>
        <td>张月</td>
        <td>女</td>
        <td>18812344322</td>
      </tr>
    </tbody>
  </table>

</body>
</html>